Liang Qian

Liang Qian was an officer of Wei and the brother of Liang Xu. When Xiahou Mao requested aid, he pushed for troops to be sent, not realizing that it was a ploy of Zhuge Liang. He was also fooled by Zhuge Liang's fake Jiang Wei, and believing that Jiang Wei had defected to Shu, almost shot an arrow at him. He decided to defect to Shu himself at the persuasion of Yin Shang and Liang Xu. Together, they opened the gates of the castle and let the Shu forces in.